4.4 Article

Sawtooth-like oscillations and steady states caused by the m/n=2/1 double tearing mode

Related references

Note: Only part of the references are listed.
Article Physics, Fluids & Plasmas

Influence of aspect ratio, plasma viscosity, and radial position of the resonant surfaces on the plasmoid formation in the low resistivity plasma in Tokamak

W. Zhang et al.

Summary: In this paper, we systematically investigate the nonlinear evolution of the resistive kink mode in the low resistivity plasma in Tokamak geometry. We find that the aspect ratio of the initial equilibrium can significantly influence the critical resistivity for plasmoid formation. Additionally, the critical resistivity for plasmoid formation decreases with increasing plasma viscosity in the moderately low resistivity regime. The geometry of Tokamaks also affects the critical resistivity for plasmoid formation.

NUCLEAR FUSION (2022)

Article Computer Science, Interdisciplinary Applications

Linear and nonlinear benchmarks between the CLT code and the M3D-C1 code for the 2/1 resistive tearing mode and the 1/1 resistive kink mode

W. Zhang et al.

Summary: By comparing the simulation results of CLT code and M3D-C1 code, it was found that they were almost identical in terms of resistive kink mode and tearing mode, including linear and nonlinear growth rates. This indicates that the simulation results for the 1/1 resistive-kink mode and 2/1 tearing mode are accurate and reliable.

COMPUTER PHYSICS COMMUNICATIONS (2021)

Article Physics, Fluids & Plasmas

Nonlinear evolution and secondary island formation of the double tearing mode in a hybrid simulation

Aohua Mao et al.

Summary: In this study, the evolution of DTMs without a guide field is numerically investigated using a hybrid model, showing qualitative consistency with previous works and analyzing particle dynamics in detail. Different behaviors of ions and electrons around the reconnection region lead to Hall effects producing the out-of-plane quadrupole magnetic field, and the explosive reconnection process results in the emergence of secondary magnetic islands due to asymmetric drive and thin current layer features.

PLASMA SCIENCE & TECHNOLOGY (2021)

Article Physics, Fluids & Plasmas

Numerical study on nonlinear double tearing mode in ITER

S. S. Lu et al.

Summary: The study on the nonlinear dynamics of the m/n = 2/1 double tearing mode (DTM) in ITER shows that explosive bursts occur only with moderate separation or strong magnetic shear strength between the two rational surfaces. In cases of large separation and weak shear strength between the two rational surfaces, the magnetic islands saturate without strong interaction with each other.

NUCLEAR FUSION (2021)

Article Physics, Fluids & Plasmas

Influence of Hall effect and toroidal flow on the plasmoid formation and incomplete reconnection in a low resistivity plasma in tokamak

W. Zhang et al.

Summary: In this study, the nonlinear resistive-kink mode in low resistivity plasma in tokamak was investigated using a 3D, toroidal, nonlinear Hall-MHD code. It was discovered that the effect of two-fluid dynamics and toroidal flow can significantly alter the behavior of the resistive-kink mode, leading to a different evolution of magnetic islands and reconnection processes. Additionally, the investigation into the toroidal effect showed that the widths of the main m/n = 1/1 island and the secondary island slightly increase with increasing aspect ratios.

NUCLEAR FUSION (2021)

Article Physics, Fluids & Plasmas

Identification of multiple eigenmode growth rates towards real time detection in DIII-D and KSTAR tokamak plasmas

T. Liu et al.

Summary: The successful application of 3D magnetohydrodynamic spectroscopy in tokamak experiments allows for the identification of multi-mode eigenvalues and real-time detection of stability. The new method efficiently uses internal coils to apply 3D fields for active plasma stability detection. Numerical validation has shown that this method is robust and more efficient for real-time monitoring of plasma stability based on stable mode eigenvalues.

NUCLEAR FUSION (2021)

Article Physics, Fluids & Plasmas

Investigation of annular/central collapse events triggered by the double tearing modes in EAST

Ming Xu et al.

Summary: The annular/central collapses of electron temperature in the EAST tokamak have been studied, with precursor modes being excited before these events. Multiple magnetic island chains coexist for high-Z impurity concentrations. Reproduction of annular/central collapse events is achieved through magnetic reconnection of m/n = 2/1 double tearing modes. Different penetration depths of high-Z impurity density play a key role in exciting these events, along with the establishment of reversed magnetic shear.

NUCLEAR FUSION (2021)

Article Physics, Fluids & Plasmas

Experimental study of double tearing mode on EAST tokamak

Mingfu Wu et al.

PLASMA SCIENCE & TECHNOLOGY (2020)

Article Physics, Fluids & Plasmas

Role of Hall effect on the resistive kink mode in tokamaks

W. Zhang et al.

PLASMA PHYSICS AND CONTROLLED FUSION (2020)

Article Physics, Fluids & Plasmas

Influence of shear flows on dynamic evolutions of double tearing modes

W. Zhang et al.

NUCLEAR FUSION (2020)

Article Nuclear Science & Technology

Numerical Studies of Fast Pressure Crash Associated with Double Tearing Modes

W. Zhang et al.

Summary: The study found that the fast pressure crash associated with DTMs is not directly linked to their explosive growth, which occurs earlier in the nonlinear phase, while the pressure crash happens later in the nonlinear stage. Additionally, it was observed that the radial flow plays a crucial role in transferring hot plasma around the magnetic axis to the outer region, leading to the fast pressure crash.

JOURNAL OF FUSION ENERGY (2020)

Article Physics, Fluids & Plasmas

Dynamic evolution of resistive kink mode with electron diamagnetic drift in tokamaks

W. Zhang et al.

PHYSICS OF PLASMAS (2019)

Article Physics, Fluids & Plasmas

Numerical study on nonlinear growth of m/n=3/1 double tearing mode in high Lundquist number regime

W. Guo et al.

PLASMA PHYSICS AND CONTROLLED FUSION (2019)

Article Physics, Fluids & Plasmas

Core-crash sawtooth associated with m/n=2/1 double tearing mode in Tokamak

W. Zhang et al.

PLASMA PHYSICS AND CONTROLLED FUSION (2019)

Article Physics, Fluids & Plasmas

Effect of plasmoids on nonlinear evolution of double tearing modes

J. Ma et al.

NUCLEAR FUSION (2017)

Article Physics, Fluids & Plasmas

Overview of the present progress and activities on the CFETR

Yuanxi Wan et al.

NUCLEAR FUSION (2017)

Article Physics, Fluids & Plasmas

Hall effect on tearing mode instabilities in tokamak

W. Zhang et al.

PHYSICS OF PLASMAS (2017)

Article Physics, Fluids & Plasmas

Nonlinear evolution of neo-classical tearing modes in reversed magnetic shear tokamak plasmas

Zheng-Xiong Wang et al.

NUCLEAR FUSION (2015)

Article Physics, Fluids & Plasmas

Self-suppression of double tearing modes via Alfven resonance in rotating tokamak plasmas

Zheng-Xiong Wang et al.

PHYSICS OF PLASMAS (2011)

Article Physics, Fluids & Plasmas

Interlocking and nonlinear saturation of double tearing modes in differentially rotating plasmas

Xian-Qu Wang et al.

PHYSICS OF PLASMAS (2011)

Article Physics, Fluids & Plasmas

Controlling sawtooth oscillations in tokamak plasmas

I. T. Chapman

PLASMA PHYSICS AND CONTROLLED FUSION (2011)

Article Physics, Multidisciplinary

Magnetic-Flux Pumping in High-Performance, Stationary Plasmas with Tearing Modes

C. C. Petty et al.

PHYSICAL REVIEW LETTERS (2009)

Article Physics, Fluids & Plasmas

Nonlinear evolution of double tearing mode in Hall magnetohydrodynamics

C. L. Zhang et al.

PHYSICS OF PLASMAS (2009)

Article Physics, Multidisciplinary

Fast resistive reconnection regime in the nonlinear evolution of double tearing modes

Z. X. Wang et al.

PHYSICAL REVIEW LETTERS (2007)

Review Physics, Fluids & Plasmas

Advanced tokamak research on JT-60

H Kishimoto et al.

NUCLEAR FUSION (2005)

Article Physics, Fluids & Plasmas

Advanced scenarios for ITER operation

ACC Sips

PLASMA PHYSICS AND CONTROLLED FUSION (2005)

Article Physics, Fluids & Plasmas

Electron heated internal transport harriers in JET

GMD Hogeweij et al.

PLASMA PHYSICS AND CONTROLLED FUSION (2002)

Article Physics, Fluids & Plasmas

Effect of q-profile modification by LHCD on internal transport barriers in JET

CD Challis et al.

PLASMA PHYSICS AND CONTROLLED FUSION (2001)

Article Physics, Fluids & Plasmas

Nonlinear evolution of double tearing modes

Y Ishii et al.

PHYSICS OF PLASMAS (2000)

Article Physics, Fluids & Plasmas

Nonlinear evolution of double tearing modes in tokamaks

E Fredrickson et al.

PHYSICS OF PLASMAS (2000)

Article Physics, Fluids & Plasmas

MHD phenomena in reversed shear discharges on ASDEX Upgrade

S Günter et al.

NUCLEAR FUSION (2000)